Surname
- Alejandro Alonso (disambiguation)
- Alfredo Alonso, Cuban media executive
- Alicia Alonso (born 1920), Cuban ballerina and choreographer
- Armando Alonso (born 1984), Costa Rican footballer
- Braulio Alonso (1916–2010), American educator
- Clara Alonso (born 1987), Spanish model
- Dámaso Alonso (1898–1990), Spanish poet, philologist and literary critic
- Daniella Alonso (born 1978), American actress
- Diego Alonso (born 1975), Uruguayan footballer
- Edu Alonso (born 1974), Spanish footballer
- Ernesto Alonso (1917–2007), Mexican film director and producer
- Fernando Alonso (born 1981), Spanish Formula One driver
- Iván Alonso (born 1979), Uruguayan footballer
- Jessica Alonso (born 1983), Spanish handball player
- Juan Alonso (1927–1994), Spanish footballer
- Julián Alonso (born 1977), Spanish tennis player
- Laz Alonso (born 1974), American actor
- Lisandro Alonso (born 1975), Argentine filmmaker
- Manuel A. Alonso (1822–1889), Puerto Rican writer
- Marcos Alonso Peña (born 1959), Spanish footballer
- María Conchita Alonso (born 1957), Cuban singer and actress
- Mikel Alonso (born 1980), Spanish footballer
- Noel Alonso (born 1987), Spanish footballer
- Norberto Alonso (born 1953), Argentine footballer
- Osvaldo Alonso (born 1985), Cuban footballer
- Pichi Alonso (born 1954), Spanish footballer
- Tomás N. Alonso (1881–1962), Filipino writer
- William Alonso (1933–1999), Argentinian-American economist
- Xabi Alonso (born 1981), Spanish footballer
- Yonder Alonso (born 1987), Cuban baseball player
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